Nut lock



Patented Jan. 19, 1926.

' UNITED STATES JOSEPH M. PERRY, O]? MAY'FIELD, PENNSYLVAIN'IA.

Appllcation flled April 23, 1925. Serial N0. 25,864.

T all whom it may concern:

Be it known that I, JOSEPH M. PERRY, a eitizen of the United Staates, residing at Mayfield in the county of Lackawanna and State of Pennsylvania, have invented 0ertain new and useful Improvements in a Nut Lock, of which the following is a specification.

This invention relates to an improved nut look of the type wherein especiallil constructed auxiliary means is carried y the nut and the holt is reconstructedto accommodate said means.

More particularly, I propose to provide the bolt with circumferentially spaced longitudinal kefy ways, and to provide the nut with a spring pressed key which is permanently carried thereby and which is receivable in any one of the key ways to prevent accidental rotation of the nut about the holt 01' longitudinal slippage on the bolt.

The particular details employed for accomplishing this result will become apparent from the following description and drawing.

In the accompanying drawing formin a part of this application and in which l1ke numerals are employed to designate like parts throughout the same:

Figure 1 is a top plan view of a nut and holt constructed in accordance with my idea.

Figure 2 is an enlarged section and ele vational view showing the structure more plainly and indicating the locking or retaining means in efiective position.

Figure 3 is a horizontal section.

Figure 4 is a perspective view of the retaining key.

Figure 5 is a central vertical section through the nut showing one of the keyways in elevation.

Referring to the drawin s in detziil, the referenee character 1 des1gnates a holt, which in Order to adapt it to the present invention is provided with a plurality of ciroumferentially spaced keyways 2 extend- .ing through the free end as shown.

The chief feature of the present invention is the nut 3. This is the usual hexagonal, square, 01' other form ofi nut, and in the present instance it is provided in one side with a vertical groove 4 opening through the screvv threads as shown in Figure 5. This groove is enlarged at a point between its ends as indicated at 5 to provide a Sat ofthe shape shown in the figure last named.

The groove 4 is adapted for reception of a slidable key 6. This key is simply in the form of a strip of metal of polygonal cross section fitted in the groove and adapted to be projected from the same into one of the aforesaid keyways 2 in the bolt. In Figure 4 it will be noted that the key is provided on opposite sides with segmental projections 7 adapted to fit in the half-porti0ns of the aforesaid circular seat 5. Also, at a point between these projections it is provided with a screw threaded hole 8. In this counection it Will be observed that the stem of a screw or the like 9 extends through one side of the nut und into and through the seat 5 und is threaded into the hole 8. Furthermore, a coiled spring 10 surrounds this holt, and bears at one end against the key, thus resisting the inward movement of the latter into the groove 4.

From the foregoing description it will be seen that normally, the small holt 9 is turned in the manner to feed the key 6 into the groove 4 against the tension of the spring 10, the holt then serving to hold the key in this position. The key is now in such a position as not to interfere with the placement of the nut 3 upon the holt 1. Therefore, the nut is tightened in the usual way as if no auxiliary locking means were present. After the nut has been tightened to the desired degree '1t is given an additional turn, more or less, to position the key 6 opposite one of the adjacent keyways 2. The holt 9 may now be turned to feed the key into the keyway as indicated in Figure 2. Obviously, when the key is thus forced into the keyway, it absolutely prevents acci dental rotation, and possible subsequent loss of the nut If desired, the holt 9 1nay now be removed, for the key will be held firmly in place by the coiled spring 10.

It is thought that by considering the description in connection with the drawing, persons familiar with inventions of th1s dass will be able to obtain a clear underdisposed in said pockets und perxnitting transverse movement but preventing longitudinal movement of the key in said groove, a c0il spring having one end disposed in said pocket and its other end bearing a ainst said key, said key being formed w1th a screw threaded hole, and a retracting holt carried by said nut und having its threaded shank extending into said screw threaded hole.

In testimony whereof I affix rny signature.

-JOSEPH M. PERRY. 

